摘要
针对海陆交汇地区的海岸带范围广、地物少、测绘困难的问题,深入分析工作区潮汐时间的特点,利用DLT法完成了无人机传感器的检校后,利用航空遥感手段获取工作区高、低潮位的数字影像。在机载POS技术的辅助下完成了无地面控制点的DEM和DOM成果制作,其平面精度优于2.5 m,高程精度优于5 m。当仅布设四角控制点时其平面和高程精度可迅速提高至1 m,满足后续地质调查的指标需求,解决了海岸带、滩涂地区难以布设控制点的难题。在此基础上利用CIWI、NDWI、NDVI指数建立的模型可实现自动化水边线提取、人工和淤泥质海岸线提取模型及潮间带DEM反演,其成果与实地测量的结果具有较好的一致性。
In view of the problems of wide range of coastal zone,less surface features and difficult mapping in the sea land intersection area,the characteristics of tide time in the working area are analyzed in depth.After the UAV sensor calibration is completed by DLT method,the digital images of high and low tide levels in the working area are obtained by aerial remote sensing.With the help of airborne POS technology,the production of DEM and DOM without ground control points is completed.The plane accuracy is better than 2.5 m,and the elevation accuracy is better than 5 m.When only four corner control points are set,the plane and elevation accuracy can be rapidly increased to 1 m,which can meet the index requirements of subsequent geological survey,and solve the problem that it is difficult to set control points in coastal zone and beach area.On this basis,the models established by ciwi,NDWI and NDVI indexes can realize automatic waterfront extraction,artificial and muddy Coastline Extraction Models and DEM inversion of intertidal zone,and the results are in good agreement with the field survey results.
作者
陈洁
李天祺
李勇志
尚博譞
CHEN Jie;LI Tianqi;LI Yongzhi;SHANG Boxuan(China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100101,China)
出处
《北京测绘》
2020年第10期1303-1308,共6页
Beijing Surveying and Mapping
基金
中国地质调查局项目(DD20190514,164130)
2020年度北京测绘学会测绘地理信息工程奖(2020-02-02-04)。
关键词
航空遥感
像机检校
岸线提取
潮间带地形反演
水边线提取
aerial remote sensing
camera calibration
shoreline extraction
intertidal terrain inversion
waterfront extraction
